05000298/FIN-2012004-10
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Finding | |
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Title | Failure to Follow Surveillance Procedures for Reactor Equipment Cooling |
Description | The inspectors documented a self-revealing, non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, associated with the failure of the licensee to ensure compliance with the requirements of the stations Surveillance Procedure 6.1REC.101, REC Surveillance Operation (IST) (DIV 1), Revision 12. Specifically, operators failed to ensure that division one of the reactor equipment coolant system was maintained above 65 psig as required by procedure. This resulted in the system header low pressure alarm and isolation of the noncritical loop. The licensee entered this deficiency into their corrective action program for resolution as Condition Report CR-CNS-2012-05396. The failure to follow the stations Surveillance Procedure 6.1REC.101 on August 9, 2012, was a performance deficiency. The performance deficiency was more than minor and is therefore a finding because it is associated with the human performance attribute of the Mitigating Systems Cornerstone and affected the associated cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Additionally, if left uncorrected, the failure to follow station procedures could become a more significant concern, in that the failure to follow site procedural requirements could render other safety-related equipment inoperable without the knowledge and approval of site management or control room personnel. The inspectors evaluated the finding using Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process For Findings At-Power. The inspectors determined that the finding was of very low safety significance (Green) because the finding did not involve both the complete or partial loss of a support system that contributes to the likelihood of, or causes, an initiating event and affected mitigation equipment. The finding was determined to have a cross-cutting aspect in the area of human performance, associated with the decision making component, because the licensee failed to use conservative assumptions. Specifically, operators failed to validate their assumptions of the noncritical system header isolation and system header low pressure alarm set points for reactor equipment cooling system and allowed system pressure to go below the procedurally required limit which resulted in the reactor equipment cooling system low header pressure alarm and an automatic isolation signal for noncritical header loop. |
Site: | Cooper |
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Report | IR 05000298/2012004 Section 4OA2 |
Date counted | Sep 30, 2012 (2012Q3) |
Type: | NCV: Green |
cornerstone | Initiating Events |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | J Josey J Laughlin P Elkmann R Hagar A Fairbanks C Henderson G Guerra |
CCA | H.14, Conservative Bias |
INPO aspect | DM.2 |
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Finding - Cooper - IR 05000298/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cooper) @ 2012Q3
Self-Identified List (Cooper)
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